Allowance for Doubtful Accounts - Schedule of Allowance for Retail, Wholesale, Trade & Other (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	$ 49	$ 51	$ 48	$ 49
Provision for doubtful accounts, net of recoveries	3	1	6	8
Charge-off of accounts	(1)	(1)	(4)	(6)
Allowance for Doubtful Accounts Receivable, Recoveries		0		0
Financing Receivable, Allowance for Credit Losses, Other	(2)	1	(3)	1
Allowance for doubtful accounts at end of period	50	52	50	52
Allowance for Doubtful Accounts [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for Doubtful Accounts Receivable, Recoveries	1		3
Retail Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	19	21	17	19
Provision for doubtful accounts, net of recoveries	2	(1)	5	5
Charge-off of accounts	(1)	(1)	(4)	(5)
Financing Receivable, Allowance for Credit Losses, Other	0	1	0	1
Allowance for doubtful accounts at end of period	21	20	21	20
Impaired Financing Receivable, Average Recorded Investment			19
Wholesale Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	3	2	3	2
Provision for doubtful accounts, net of recoveries	0	1	0	1
Charge-off of accounts	0	0	0	0
Financing Receivable, Allowance for Credit Losses, Other	0	0	0	0
Allowance for doubtful accounts at end of period	3	3	3	3
Trade and Other Receivables [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts at beginning of period	27	28	28	28
Provision for doubtful accounts, net of recoveries	1	1	1	2
Charge-off of accounts	0	0	0	(1)
Financing Receivable, Allowance for Credit Losses, Other	(2)	0	(3)	0
Allowance for doubtful accounts at end of period	26	$ 29	26	$ 29
Trade and Other Receivables [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for Doubtful Accounts Receivable, Recoveries	0		0
Wholesale Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for Doubtful Accounts Receivable, Recoveries	0		0
Retail Portfolio [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for Doubtful Accounts Receivable, Recoveries	$ 1		$ 3